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© 2017 Preferred Process Solutions, LLC
2017 Technology Workshop
Laser Sorters Minimize Iron Content and
Maximize Yield for Quartz Producers
Image used with permission: www.tomitheos.com
A.J. DeCenso Harold Cline
Preferred Process Solutions TOMRA Sorting Solutions
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© 2017 Preferred Process Solutions, LLC
About Preferred Process Solutions
Milling
Screening
Air Classifying
Sorting
Centrifuging
Coating Plant Design
Drying
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© 2017 Preferred Process Solutions, LLC
About TOMRA Group
• Listed on Oslo Stock Exchange (OSEBX:TOM)
• 2,800 employees
• Revenues equal to $760 million (2016)
The Tomra Group
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© 2017 Preferred Process Solutions, LLC
Color Sorter Video
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© 2017 Preferred Process Solutions, LLC
Principle of a Sensor Based Sorter
The feed material (1) slides down a chute, is scanned by various sensor types (2) while sliding and is separated by air jets into the separation chamber (3).
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© 2017 Preferred Process Solutions, LLC
Color Sorting Examples
Talc
Accepts Rejects
Magnesite
Accepts Rejects
Limestone
Accepts Rejects
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© 2017 Preferred Process Solutions, LLC
Quartz for Metallurgical Grade Silicon
All silicon metal shares a common
origin: Quartz (SiO2). Quartz is
reduced to silicon (Si) in a high
temperature melting process using
carbon and high temperatures in
an electric arc furnace. 1
Quartz used to
produce metallurgical
grade silicon must be
low in iron, typically
less than 0.04%.For silicon metal to be used in solar
and semiconductor applications it
must be extremely pure. For solar
applications, the metal must be
99.9999% Si. 1
1 Courtesy of The QUARTZ Corp
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© 2017 Preferred Process Solutions, LLC
Quartz Sorting with Conventional Color Sorter
ROM Feed
Color Sorter
69 t/h
0.037% Fe
Sorted
Product
31 t/h
0.278% Fe
Rejects
Analysis of reject pile
shows that over 2/3 of
the rocks in this pile
have < 0.04% Fe !!
100 t/h
0.110% Fe
Required product spec
<0.040% Fe
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© 2017 Preferred Process Solutions, LLC
Range of Color Variation in Feed to Sorter
0.009% Fe
0.011% Fe
0.019% Fe
0.021% Fe
0.341% Fe
Color Sorter Accepts
Color Sorter Ejects
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© 2017 Preferred Process Solutions, LLC
Laser Scattering
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© 2017 Preferred Process Solutions, LLC
PRO Secondary Laser Sorter
NOTE: Double-Sided Laser for looking at both sides of
material
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© 2017 Preferred Process Solutions, LLC
Sorter Installations
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© 2017 Preferred Process Solutions, LLC
Laser Scatter Sorter Images
0.009% Fe
0.011% Fe
0.019% Fe
0.021% Fe
0.341% Fe
Laser Sorter Accepts
Laser Sorter Ejects
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© 2017 Preferred Process Solutions, LLC
Quartz Sorting with TOMRA Laser Sorter
11 t/h
0.708%Fe
Rejects
89 t/h
0.036% Fe
Sorted
Product
Laser Sorter
ROM Feed
100 t/h
0.110% Fe
Required product spec
<0.040% Fe
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© 2017 Preferred Process Solutions, LLC
Comparison of Sorter Performance
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© 2017 Preferred Process Solutions, LLC
Financial Implications of High Yield Laser Sorting
Color Sorter Laser Sorter
Feed Rate to Sorter 100t/h 100t/h
Product Yield 69% 89%
Production Rate 69t/h 89t/h
Product Value $50 per ton $50 per ton
Revenue $3,450 per hour $4,450 per hour
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© 2017 Preferred Process Solutions, LLC
Contacts
PO Box 12762
Charlotte, NC 28220
www.PreferredProcessSolutions.com
A.J. DeCenso
phone: (803) 389-0768
email: [email protected]
65 Inverness Drive East
Englewood, CO 80112
www.tomra.com/mining
Harold Cline
phone: (303) 626-7740
email: [email protected]
